[电动机械L4a补充教材]MIT_JamesL.KirtleyJr._基本磁路.pdf.PDFVIP

.tw/twocw/mit/NR/rdonlyres/Electrical-Engineer ing-and-Computer-Science/6-685Fall-2005/18D3EAA5-C330-4619-8523-8 4588BE2E920/0/chapter2.doc 麻省理工學院 Massachusetts Institute of Technology 電機工程及電腦科學系 Department of Electrical Engineering and Computer Science 6.685 Electric Machines 電機機械 課堂講義2 ：基本磁路 2005 年9 月5 日 Class Notes 2 Magnetic Circuit Basics September 5, 2005 ©2003 James L. Kirtley Jr. 1. 導論導論 導論導論 磁路學相似於電路學 ，提供一種簡單的方法，只要將幾種個別元件組合起來就能用 以分析磁場系統。在電路學，這些元件是電源、電阻等，各有不同的電流、電壓值， 1 ）和 使用導線連接在一起 ，其行為則以網路的限制條件（克希荷夫電壓和電流定律 2 3 基本關係例如歐姆定律 來描述 ；在磁路學，合成參數稱為磁阻 （磁阻的倒數稱為 磁導4 ）。相當於導線的部份則為高磁導的磁路元件。當然高導磁係數就對應於高導 電係數 。 將磁場系統化成幾個合成參數元件 ，並使用網路的限制和基本關係 ，可以簡化分析 磁場系統的方法 。 1 Introduction Magnetic Circuits offer, as do electric circuits, a way of simplifying the analysis of magnetic field systems which can be represented as having a collection of discrete elements. In electric circuits the elements are sources, resistors and so forth which are represented as having discrete currents and voltages. These elements are connected together with ‘wires’ and their behavior is described by network constraints (Kirchhoff’s voltage and current laws) and by constitutive relationships such as Ohm’s Law. In magnetic circuits the lumped parameters are called ‘Reluctances’(the inverse of ‘Reluctance’ is called ‘Permeance’). The analog to a ‘wire’ is referred to as a high permeance magnetic circuit element. Of course high permeability is the analog of high conductivity. By organizing magnetic field systems into